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TiO2 nanotubes: Nitrogen-ion implantation at low dose provides noble-metal-free photocatalytic H2-evolution activity

: Zhou, X.; Häublein, V.; Liu, N.; Nguyen, N.T.; Zolnhofer, E.M.; Tsuchiya, H.; Killian, M.S.; Meyer, K.; Frey, L.; Schmuki, P.


Angewandte Chemie. International edition 55 (2016), Nr.11, S.3763-3767
ISSN: 1433-7851
ISSN: 0044-8249
ISSN: 0570-0833
ISSN: 1521-3773
Fraunhofer IISB ()

Low-dose nitrogen implantation induces an ion and damage profile in TiO2 nanotubes that leads to “co-catalytic” activity for photocatalytic H2-evolution (without the use of any noble metal). Ion implantation with adequate parameters creates this active zone limited to the top part of the tubes. The coupling of this top layer and the underlying non-implanted part of the nanotubes additionally contributes to an efficient carrier separation and thus to a significantly enhanced H2 generation.